“Probably five years before our divorce, Reagan or somebody brought him a letter and said, ‘You should run for president,’” Donald’s first wife tells The Post at her opulent seven-floor Upper East Side town house, which she purchased for $2.8 million in 1998.

“So he was thinking about it. But then . . . there was the divorce, there was the scandal, and American women loved me and hated him,” she says, referencing Donald’s much-publicized infidelity with Marla Maples that led to the power couple’s 1991 split. “So there was no way that he would go into [politics] at that point,” Ivana says. “But he was always tooling around with the idea.”

No tooling now — now, Donald’s the GOP front-runner.

Perhaps that is why Trump paid homage to Reagan using his campaign slogan from the 1980 race:

I was proud to be one of Ronald Reagan’s earliest supporters. Like Reagan, it’s time to Make America Great Again!http://t.co/toq7Ddalco